And wipiam s



JAMES E. EMERSON, V01a TRENTON, NEW JERSELANDW'ILMAN'S. WINSOR;

` or THUSVILLE, PENNSYLVANIA,

Letters .Patent lfm-74,523, yelated February 1.48, 1868.

. IMPROVEMENT IN SAWS.

TO ALL WHOM .IT MAY CONCERN:

' Beit known that we, JAMES E. EMERSQN, of Trentoinin Ythe county ofMercer, arid State of New, Jersey,

and WILLIAM S WINSOR, of Titusville, infthecounty of Crawford, `andState of Pennsylvania, bave'invented new and useful Improvement inP1ailing-Saws; and that' the following is a. full, cler, and exactdescription o f thesame, reference being1k had to the accompanyingdrawings, Emaking apart of thisspeciiiclttiom, in`which\ Figure 1represents a portion of a circuler saw constructed after our generalplan. v Figures 2 and` represent views fronfopposite sides of theplaning-tool, 'and on an, enlarged" scale frein Ithe same, as shown inplace in the saw in iig. 1, l

Figures 4 and 'yrefireset cross-sections through the jsaw-plate, andshovvfmorev particularly 'the `projection of the planing-tool brinstrument from the faceof theiplate.V Y

'Simi-lar letters of reference, where vthey occur in-the sepa-rateig'ures, denote like parts of the saw in allot thedrawings. e f Y l IOur invention; consists in combining with a. saw and lplnner'ou one'plate, a support, guide, or gauge, at or Our inventionfurtherconsist'sfin inserting'end holding a. planing-cutteryina saw-plate, bymeans of-n tapered opening in the plate, and'a'tongue or tongues on one,and a groove orgrooves4 in the other. i

To enable others skilled in the art to make and use 'our invention, wewill proceedl to describe the same near the pla.ning-cutters, to preventthem from running into or taking too rank ay hold of the wood; and jvwith reference to the drawings. y

4 A represents a sa-w-plate,"ronwhich removable and'- replaceable teethB are arranged. 'This saw-plate-is of' nearly4 uniform thicknessthroughoutand'has planing-jcutters-C- connected `With`it, near itslsawing-edge. The planingcutters C, as shown .in figs. 2 and 3, arerights and lei'ts, that is, their cutting-,edges are alltel'. nately onone side and then ontheother sid-eroi' the saw; orfii' not alternatelylso, thenythe setsare so' arranged. We preferto make these planrxgcuttersC removable, and to'secure them tothe plate by an opening D, having atapering 'form and bevelled edges,wh icl1 letterVA *takeintoV grooves'formed in the edgesof the planing-critters.` The-cutters'may have aholethrough them, ntohvvhich a steel pin is inserted, and by tappingupon the pin withA a hammer or otherwise, the lcutter may be set backand tightenedin its seat, or started forward-to loosen it, as may bedesired. To'pre'ven-t the cutters from taking too rank a hold ofthetimber, or from biting into the wood, a projection, a, is formed onleach'cutter,lw'hicl1 servesas a gauge or guide toprevent thecuttng-edgo from taking into the timber. The rear portion of the cutter,behind its cutting-edge, and' on that side of it,A serves as a. guide orgauge on that'side, so that vvhilst the saw-teeth arecutting the kerf',the cutters C are planing the timber o'n both sides of the ker-f. Thatpart of the cutting-edge of theplaning-knives most remote' from theperimeter, as vseenat-c,`is bevelled ofi" seas not to cut atrthatcorner, .thetioing of which would clog the cutter. I l Y, i. ,n l

These planing-cutters are.` equally applieabl'eto reciprocblting asl tocircular saws-aud forro their own support against biting intoor takingtoo rank1' a hold` "of the wfood. A' y Y l Having thus' fully describedour 'inventiomjvhat we claim ltherein as nem-aud desire to secure byLetters Patent, is-j t Y v In combination withsawing-teethand `planing-cutters separately attached to and removable on the samesaw-plate, Athe support, gude,.or. gauge on the planing-cutters', toprevent themyfrom 'running into or taking too rank a hold of ,the wood,substantially as. described.

J. E.'EMERSON, WM. S. WINSOR..

Witnesses:

JAMss Roenes, J. VANQE Pownns.

